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94d2b0d2fd
This will allow for easier implementation of ARM-optimized functions in libraries other than libavcodec.
111 lines
3.6 KiB
ArmAsm
111 lines
3.6 KiB
ArmAsm
/*
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* Copyright (c) 2011 Mans Rullgard <mans@mansr.com>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/arm/asm.S"
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function ff_ac3_max_msb_abs_int16_neon, export=1
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vmov.i16 q0, #0
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vmov.i16 q2, #0
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1: vld1.16 {q1}, [r0,:128]!
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vabs.s16 q1, q1
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vld1.16 {q3}, [r0,:128]!
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vabs.s16 q3, q3
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vorr q0, q0, q1
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vorr q2, q2, q3
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subs r1, r1, #16
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bgt 1b
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vorr q0, q0, q2
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vorr d0, d0, d1
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vpmax.u16 d0, d0, d0
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vpmax.u16 d0, d0, d0
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vmov.u16 r0, d0[0]
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bx lr
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endfunc
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function ff_ac3_exponent_min_neon, export=1
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cmp r1, #0
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it eq
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bxeq lr
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push {lr}
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mov r12, #256
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1:
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vld1.8 {q0}, [r0,:128]
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mov lr, r1
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add r3, r0, #256
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2: vld1.8 {q1}, [r3,:128], r12
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subs lr, lr, #1
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vmin.u8 q0, q0, q1
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bgt 2b
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subs r2, r2, #16
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vst1.8 {q0}, [r0,:128]!
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bgt 1b
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pop {pc}
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endfunc
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function ff_ac3_lshift_int16_neon, export=1
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vdup.16 q0, r2
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1: vld1.16 {q1}, [r0,:128]
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vshl.s16 q1, q1, q0
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vst1.16 {q1}, [r0,:128]!
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subs r1, r1, #8
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bgt 1b
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bx lr
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endfunc
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function ff_ac3_rshift_int32_neon, export=1
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rsb r2, r2, #0
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vdup.32 q0, r2
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1: vld1.32 {q1}, [r0,:128]
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vshl.s32 q1, q1, q0
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vst1.32 {q1}, [r0,:128]!
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subs r1, r1, #4
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bgt 1b
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bx lr
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endfunc
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function ff_float_to_fixed24_neon, export=1
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1: vld1.32 {q0-q1}, [r1,:128]!
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vcvt.s32.f32 q0, q0, #24
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vld1.32 {q2-q3}, [r1,:128]!
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vcvt.s32.f32 q1, q1, #24
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vcvt.s32.f32 q2, q2, #24
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vst1.32 {q0-q1}, [r0,:128]!
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vcvt.s32.f32 q3, q3, #24
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vst1.32 {q2-q3}, [r0,:128]!
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subs r2, r2, #16
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bgt 1b
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bx lr
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endfunc
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function ff_ac3_extract_exponents_neon, export=1
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vmov.i32 q15, #8
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1:
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vld1.32 {q0}, [r1,:128]!
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vabs.s32 q1, q0
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vclz.i32 q3, q1
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vsub.i32 q3, q3, q15
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vmovn.i32 d6, q3
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vmovn.i16 d6, q3
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vst1.32 {d6[0]}, [r0,:32]!
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subs r2, r2, #4
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bgt 1b
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bx lr
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endfunc
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